This is why one piece is good. Too many people trying to understand how it happens but failed while its this simple. Luffy wasnt even there in the first place so its impossible for big mom to detect.
Kaidou with his beasts, Strawhats with the mink beasts. This will be damn good beast fight! I'm pretty sure the minks are at par Kaido's beasts. They can hold Jack and his men. Imagine if both cat and dog fought him at the same time. The minks might have won.
